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49fb52efd6
Improves mouse events for the events-based project template. This includes a View class that: 1) Mouse events only get sent to the control under the mouse rather than all controls on the view 2) Elements will get Focus/Unfocus messages as the mouse moves in or out of their bounds
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef XYZZY_VIEW_H
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#define XYZZY_VIEW_H
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#include "xyzzy/events.h"
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namespace Xyzzy {
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/**
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* Base view class for screens and dialogs that appear on-screen.
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* The View class takes care of two important things:
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* 1) By default events get sent to all controls on a view until one
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* handles it. For mouse events, we instead want only the control the
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* mouse cursor is over to receive the events, saving the individual
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* controls from having to check if the mouse is within their bounds.
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* 2) Individual elements will get a Focus/Unfocus message as the
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* mouse enters and leaves them. This allows, for example, buttons
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* that have been pressed to de-select if the mouse leaves their bounds.
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*/
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class View : public UIElement {
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private:
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UIElement *_focusedElement = nullptr;
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/**
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* Checks if a control is entered or left
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*/
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void checkFocusedControl(const Common::Point &mousePos);
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/**
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* Check for an element at the given position
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*/
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UIElement *getElementAtPos(const Common::Point &pos) const;
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public:
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View(const Common::String &name, UIElement *uiParent) :
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UIElement(name, uiParent) {
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}
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View(const Common::String &name) :
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UIElement(name) {
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}
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virtual ~View() {
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}
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bool msgFocus(const FocusMessage &msg) override;
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bool msgUnfocus(const UnfocusMessage &msg) override;
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bool msgMouseMove(const MouseMoveMessage &msg) override;
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bool msgMouseDown(const MouseDownMessage &msg) override;
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bool msgMouseUp(const MouseUpMessage &msg) override;
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};
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} // namespace Xyzzy
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#endif
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